#!/bin/bash

# Copyright (c) 2011 Alexey I. Froloff.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

. /etc/init.d/functions

cd /etc/sysconfig/network-scripts
. ./network-functions

[ -f ../network ] && . ../network

CONFIG=${1}
TIMEOUT=10

need_config ${CONFIG}

source_config

OTHERSCRIPT="/etc/sysconfig/network-scripts/ifup-${REAL_DEVICETYPE}"

if [ ! -x ${OTHERSCRIPT} ]; then
	OTHERSCRIPT="/etc/sysconfig/network-scripts/ifup-eth"
fi

check_recursion ()
{
	[ -n "${UPPEDSTACK}" ] && for _r in ${UPPEDSTACK}; do
		[ "$_r" = "$1" ] && return 1
	done

	return 0
}

ifup_ovs_bridge ()
{
	if ovs-vsctl br-exists "${OVS_BRIDGE}"; then :; else
		/sbin/ifup "${OVS_BRIDGE}"
	fi
}

if [ -z "${UPPEDSTACK}" ]; then
	UPPEDSTACK="${DEVICE}"
fi

[ -n "${OVSREQUIRES}" ] && for _i in ${OVSREQUIRES}; do
	if ( check_recursion "$_i" ); then
		UPPEDSTACK="${UPPEDSTACK} $_i" /sbin/ifup "$_i"
	fi
done

SERVICE_UNIT=/usr/lib/systemd/system/openvswitch.service
if [ -f $SERVICE_UNIT ] && [ -x /usr/bin/systemctl ]; then
	if ! systemctl --quiet is-active openvswitch.service; then
		systemctl start openvswitch.service
	fi
else
	if [ ! -f /var/lock/subsys/openvswitch ]; then
		/sbin/service openvswitch start
	fi
fi

case "$TYPE" in
	OVSBridge|OVSUserBridge)
		# If bridge already exists and is up, it has been configured through
		# other cases like OVSPort, OVSIntPort and OVSBond. If it is down or
		# it does not exist, create it. It is possible for a bridge to exist
		# because it remained in the OVSDB for some reason, but it won't be up.
		if [ "${TYPE}" = "OVSUserBridge" ]; then
			DATAPATH="netdev"
		fi
		if check_device_down "${DEVICE}"; then
			ovs-vsctl -t ${TIMEOUT} -- --may-exist add-br "$DEVICE" $OVS_OPTIONS \
			${OVS_EXTRA+-- $OVS_EXTRA} \
			${STP+-- set bridge "$DEVICE" stp_enable="${STP}"} \
			${DATAPATH+-- set bridge "$DEVICE" datapath_type="$DATAPATH"}
		else
			OVSBRIDGECONFIGURED="yes"
		fi

		# If MACADDR is provided in the interface configuration file,
		# we need to set it using ovs-vsctl; setting it with the "ip"
		# command in ifup-eth does not make the change persistent.
		if [ -n "$MACADDR" ]; then
			ovs-vsctl -t ${TIMEOUT} -- set bridge "$DEVICE" \
				other-config:hwaddr="$MACADDR"
		fi

		# When dhcp is enabled, the assumption is that there will be a port to
		# attach (otherwise, we can't reach out for dhcp). So, we do not
		# configure the bridge through rhel's ifup infrastructure unless
		# it is being configured after the port has been configured.
		# The "OVSINTF" is set only after the port is configured.
		if [ "${OVSBOOTPROTO}" = "dhcp" ] && [ -n "${OVSINTF}" ]; then
			case " ${OVSDHCPINTERFACES} " in
				*" ${OVSINTF} "*)
					BOOTPROTO=dhcp ${OTHERSCRIPT} ${CONFIG}
				;;
			esac
		fi

		# When dhcp is not enabled, it is possible that someone may want
		# a standalone bridge (i.e it may not have any ports). Configure it.
		if [ "${OVSBOOTPROTO}" != "dhcp" ] && [ -z "${OVSINTF}" ] && \
			[ "${OVSBRIDGECONFIGURED}" != "yes" ]; then
			${OTHERSCRIPT} ${CONFIG}
		fi
		exit 0
		;;
	OVSPort)
		ifup_ovs_bridge
		${OTHERSCRIPT} ${CONFIG} ${2}
		# The port might be already in the database but not yet
		# in the datapath.  So, remove the stale interface first.
		ovs-vsctl -t ${TIMEOUT} \
			-- --if-exists del-port "$OVS_BRIDGE" "$DEVICE" \
			-- add-port "$OVS_BRIDGE" "$DEVICE" $OVS_OPTIONS ${OVS_EXTRA+-- $OVS_EXTRA}
		OVSINTF=${DEVICE} /sbin/ifup "$OVS_BRIDGE"
		;;
	OVSIntPort)
		ifup_ovs_bridge
		ovs-vsctl -t ${TIMEOUT} \
			-- --if-exists del-port "$OVS_BRIDGE" "$DEVICE" \
			-- add-port "$OVS_BRIDGE" "$DEVICE" $OVS_OPTIONS \
			-- set Interface "$DEVICE" type=internal ${OVS_EXTRA+-- $OVS_EXTRA}
		if [ -n "${OVSDHCPINTERFACES}" ]; then
			for _iface in ${OVSDHCPINTERFACES}; do
				/sbin/ifup ${_iface}
			done
		fi
		BOOTPROTO="${OVSBOOTPROTO}" ${OTHERSCRIPT} ${CONFIG} ${2}
		;;
	OVSBond)
		ifup_ovs_bridge
		for _iface in $BOND_IFACES; do
			/sbin/ifup ${_iface}
		done
		ovs-vsctl -t ${TIMEOUT} \
			-- --if-exists del-port "$OVS_BRIDGE" "$DEVICE" \
			-- add-bond "$OVS_BRIDGE" "$DEVICE" ${BOND_IFACES} $OVS_OPTIONS ${OVS_EXTRA+-- $OVS_EXTRA}
		OVSINTF=${DEVICE} /sbin/ifup "$OVS_BRIDGE"
		;;
	OVSTunnel)
		ifup_ovs_bridge
		ovs-vsctl -t ${TIMEOUT} \
			-- --if-exists del-port "$OVS_BRIDGE" "$DEVICE" \
			-- add-port "$OVS_BRIDGE" "$DEVICE" $OVS_OPTIONS \
			-- set Interface "$DEVICE" type=$OVS_TUNNEL_TYPE $OVS_TUNNEL_OPTIONS ${OVS_EXTRA+-- $OVS_EXTRA}
		;;
	OVSPatchPort)
		ifup_ovs_bridge
		ovs-vsctl -t ${TIMEOUT} \
			-- --if-exists del-port "$OVS_BRIDGE" "$DEVICE" \
			-- add-port "$OVS_BRIDGE" "$DEVICE" $OVS_OPTIONS \
			-- set Interface "$DEVICE" type=patch options:peer="${OVS_PATCH_PEER}" ${OVS_EXTRA+-- $OVS_EXTRA}
		;;
	OVSDPDKPort)
		ifup_ovs_bridge
		BRIDGE_MAC_ORIG=$(get_hwaddr $OVS_BRIDGE)
		ovs-vsctl -t ${TIMEOUT} \
			-- --if-exists del-port "$OVS_BRIDGE" "$DEVICE" \
			-- add-port "$OVS_BRIDGE" "$DEVICE" $OVS_OPTIONS \
			-- set Interface "$DEVICE" type=dpdk ${OVS_EXTRA+-- $OVS_EXTRA}
		BRIDGE_MAC=$(get_hwaddr $OVS_BRIDGE)
		# The bridge may change its MAC to be the lower one among all its
		# ports. If that happens, bridge configuration (e.g. routes) will
		# be lost. Restore the post-up bridge configuration again.
		if [ "$BRIDGE_MAC_ORIG" != "$BRIDGE_MAC" ]; then
			${OTHERSCRIPT} "$OVS_BRIDGE"
		fi
		;;
	OVSDPDKRPort)
		ifup_ovs_bridge
		ovs-vsctl -t ${TIMEOUT} \
			-- --if-exists del-port "$OVS_BRIDGE" "$DEVICE" \
			-- add-port "$OVS_BRIDGE" "$DEVICE" $OVS_OPTIONS \
			-- set Interface "$DEVICE" type=dpdkr ${OVS_EXTRA+-- $OVS_EXTRA}
		;;
	OVSDPDKVhostUserPort)
		ifup_ovs_bridge
		PORT_TYPE="dpdkvhostuser"
		PORT_PATH=""
		if [ "$OVS_PORT_MODE" == "client" ]; then
			PORT_TYPE="dpdkvhostuserclient"
			PORT_PATH="options:vhost-server-path=${OVS_PORT_PATH}"
		fi
		ovs-vsctl -t ${TIMEOUT} \
			-- --if-exists del-port "$OVS_BRIDGE" "$DEVICE" \
			-- add-port "$OVS_BRIDGE" "$DEVICE" $OVS_OPTIONS \
			-- set Interface "$DEVICE" type=$PORT_TYPE \
			$PORT_PATH \
			${OVS_EXTRA+-- $OVS_EXTRA}
		;;
	OVSDPDKBond)
		ifup_ovs_bridge
		BRIDGE_MAC_ORIG=$(get_hwaddr $OVS_BRIDGE)
		for _iface in $BOND_IFACES; do
			IFACE_TYPES="${IFACE_TYPES} -- set interface ${_iface} type=dpdk"
		done
		ovs-vsctl -t ${TIMEOUT} \
			-- --if-exists del-port "$OVS_BRIDGE" "$DEVICE" \
			-- add-bond "$OVS_BRIDGE" "$DEVICE" ${BOND_IFACES} $OVS_OPTIONS ${IFACE_TYPES} ${OVS_EXTRA+-- $OVS_EXTRA}
		BRIDGE_MAC=$(get_hwaddr $OVS_BRIDGE)
		# The bridge may change its MAC to be the lower one among all its
		# ports. If that happens, bridge configuration (e.g. routes) will
		# be lost. Restore the post-up bridge configuration again.
		if [ "$BRIDGE_MAC_ORIG" != "$BRIDGE_MAC" ]; then
			${OTHERSCRIPT} "$OVS_BRIDGE"
		fi
		;;
	*)
		echo $"Invalid OVS interface type $TYPE"
		exit 1
		;;
esac
